California Code, Education Code - EDC § 87451

Nothing in Section 87468shall be construed to give regular classification to a person in the adult school who is already classified as a regular employee in the day school.  In case an instructor obtains permanent classification in the evening school and later is eligible for the same classification in the day school by reason of having served the contract period therein, he or she shall be given a choice as to which classification he or she shall take.

Notwithstanding any other provision to the contrary, service in the evening school shall not be included in computing the service required as a prerequisite to attainment of, or eligibility to, classification as a regular employee in the day school, except service in the evening school rendered by a person rendering services in the day school who is directed or specifically requested by the community college district to render services in the evening school either in addition to, or instead of, rendering service in the day school.  Service in the day school shall not be included in computing the service required as a prerequisite to attainment of, or eligibility to, classification as a regular employee in the evening school, except service in the day school rendered by a person rendering services in the evening school who is directed or specifically requested by the community college district to render service in the day school either in addition to, or instead of, rendering service in the evening school.